What type of aircraft has one set of wings?

Monoplanes are characterized by having a single set of wings, typically mounted on the fuselage. This design allows for a more streamlined and efficient aerodynamics compared to biplanes, which have two wings stacked one above the other. Monoplanes are the most common type of aircraft you see today, including commercial airliners and general aviation planes.

The monoplane design provides various advantages such as reduced drag, improved speed, and better fuel efficiency. Additionally, modern advancements in materials and aerodynamics favor the monoplane configuration, leading to the widespread use of this design in contemporary aviation.

Biplanes, on the other hand, have two wings and are primarily used for specific applications like aerobatics or certain types of vintage aircraft. Sailplanes and drones may have various wing configurations but do not define the singular wing characteristic that distinguishes monoplane aircraft.